Comparison

gemgem400 vs Easy Number Practice

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

gemgem400

Engaging rehabilitation games designed to help individuals with limited movement on one side of the body or those needing fine motor skill improvement. The app encourages daily voluntary movements to promote neuroplasticity and build confidence through playful activities.

Highlights
  • Playful rehabilitation games
  • Fine motor skill improvement
  • Encourages voluntary movements
  • Promotes neuroplasticity
  • Builds self-confidence
  • Regularly updated content
Features
Read full description

Enjoy Fun and Engaging Rehab Games at Home with Gemgem 400! ■ Who is it for? Our game is designed for individuals with limited movement on one side of the body or those who need fine motor rehabilitation. ■ Why “400”? Because performing 400 voluntary movements a day helps activate neuroplasticity in the brain, encouraging the formation of new neural pathways. ■ How effective is it? The key is quantity and autonomy! In other words, encouraging people to move more, on their own, is what really matters. In fact, both caregivers and developers were amazed at the changes experienced by users who consistently played GemGem 400. ■ What kinds of games are included? Jump, run, pop! We offer a variety of adventures that everyone can enjoy — with new content being added regularly. With the valuable feedback of caregivers, our service continues to improve every day. ■ Our goals are to: 1. Grow with joy through gaming 2. Build self-confidence 3. Support each person’s dreams for the future Gemgem 400 cheers on everyone who is reaching toward new possibilities! End User License Agreement (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Easy Number Practice

Features
Read full description

Easy Number Practice is a calm and approachable arithmetic app for everyday practice. Large text and clear buttons make it easy to work through addition, simple calculations, multiplication tables from 2 to 5, and missing-number questions. There is no time pressure. Focus on one question at a time, review mistakes, and practice at your own pace. Key features • Easy addition and arithmetic practice • Multiplication tables from 2 to 5 • Missing-number questions • Mixed free practice • Mistake tracking and review • Large text and clear buttons • No timers or time pressure • Background themes and music settings • Practice progress overview

Screenshots

gemgem4004 screens
Easy Number Practice4 screens

Verdict

The call

The clearest difference is in-app purchases: Easy Number Practice at none against gemgem400's 5. Easy Number Practice also leads on update cadence (every 4 days vs every 3 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. gemgem400 sells 5 in-app purchases, starting at $79.99 per month. Easy Number Practice asks for nothing beyond the download.

UpkeepUpdate frequency

gemgem400 ships an update every 3 weeks, Easy Number Practice every 4 days. The most recent releases landed on October 27, 2026 and October 26, 2026 respectively.

Scorecard2 real differences · 8 level
gemgem400 versus Easy Number Practice: the parameters behind the verdict, then further details
Parametergemgem400Easy Number Practice
PriceFreeFree
Rating5.0 (1 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings1 — better—
Update frequencyEvery 3 weeksEvery 4 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better16.0
Further details — not scored
Size276 MB10 MB
Age rating4+4+
DeveloperGemgem therapeutics Inc.jinyeoung kang

In-app purchases

5 purchases

gemgem400

Subscriptions5
  • 잼잼400 정기 구독(Silver)$79.991 Month
  • 잼잼400 정기 구독(Gold)$99.991 Month
  • 잼잼400 정기 구독 - BASIC$149.991 Month
Show 2 more
  • 잼잼400 정기 구독 - SILVER$199.991 Month
  • 잼잼400 정기 구독 - GOLD$389.991 Month
None

Easy Number Practice

No in-app purchases

Questions

Is gemgem400 free?
gemgem400 is free to download, with in-app purchases available.
Is Easy Number Practice free?
Easy Number Practice is free to download, with no in-app purchases.
Do gemgem400 or Easy Number Practice have ads?
Neither gemgem400 nor Easy Number Practice shows ads.
Which is updated more often, gemgem400 or Easy Number Practice?
gemgem400 ships an update every 3 weeks, and Easy Number Practice every 4 days. Most recently, gemgem400 was updated on October 27, 2026 and Easy Number Practice on October 26, 2026.

Other comparisons